//: C20:Stlshape2.cpp
// From Thinking in C++, 2nd Edition
// Available at http://www.BruceEckel.com
// (c) Bruce Eckel 1999
// Copyright notice in Copyright.txt
// Stlshape.cpp with the purge() function
#include "../purge.h"
#include <vector>
#include <iostream>
using namespace std;

class Shape
{
public:
    virtual void draw() = 0;
    virtual ~Shape() {};
};

class Circle : public Shape
{
public:
    void draw() {
        cout << "Circle::draw\n";
    }
    ~Circle() {
        cout << "~Circle\n";
    }
};

class Triangle : public Shape
{
public:
    void draw() {
        cout << "Triangle::draw\n";
    }
    ~Triangle() {
        cout << "~Triangle\n";
    }
};

class Square : public Shape
{
public:
    void draw() {
        cout << "Square::draw\n";
    }
    ~Square() {
        cout << "~Square\n";
    }
};

typedef std::vector<Shape*> Container;
typedef Container::iterator Iter;

int main()
{
    Container shapes;
    shapes.push_back(new Circle);
    shapes.push_back(new Square);
    shapes.push_back(new Triangle);
    for (Iter i = shapes.begin();
            i != shapes.end(); i++)
        (*i)->draw();
    purge(shapes);
} ///:~
